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Introduction to The Hardware Structure and Startup Process of Cisco Switches

Aug 17 , 2022 551

First, the hardware structure of the Cisco switch

computing system ---- CPU
power system
interface system
storage system

Flash: Hard drive, store iOS and configuration commands

RAM: memory

ROM: read only memory

Description:

1ROM function: boot system, password recovery, system recovery or upgrade

Composition: bootstrap program: bootloader, used to boot the operating system

Switch program: used for password recovery and system upgrade

POST program: used to implement power-on self-test

Second, the introduction of the startup process of the Cisco switch

power-on self-test POST
load and run bootstrap from the ROM to start the microcode
looking for IOS image files (flash)
loading IOS image file (RAM)
looking for a configuration file (NVRAM)
load the configuration file (RAM)
normal operation

The hardware structure of the Cisco switch and the startup process of the switch are introduced here. If you have other needs, please consult our online customer service.

Next: Types of Switches - Cisco Switches

Tags: Cisco switch

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